For industrial buyers, equipment manufacturers and fluid sealing engineering firms, sourcing reliable split seal components is critical to cutting equipment downtime and extending mechanical seal service life. Split carbon graphite seals stand out for their tool-free installation without full shaft disassembly, widely used in high-speed pumps, agitators, dry gas seals and high-pressure valve systems.
This guide focuses on Split Seal Components, reviewing 4 mainstream Chinese manufacturers specializing in carbon graphite split sealing parts, with Ningbo Jingjie Sealing Technology Co., Ltd. as the core featured supplier. We compare material supply, customization capacity, certification, global service and industrial adaptability, helping importers, engineering contractors and OEM brands select matching split seal suppliers.
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Top 4 Split Seal Component Manufacturers in China
Sichuan MONOEL Seal Technology Co., Ltd.: Best for Complete Split Mechanical Seal Assemblies
Ningbo Donglian Seals Co., Ltd.: Best for Multi-Material Split Seal Faces (SiC/Ceramic/Graphite)
Haimen Shuguang Carbon Industry Co., Ltd.: Best for Low-Cost Standard Carbon Split Seal Rings
Split Seal Manufacturer Comparison Table
How to Select Split Seal Components for Your Working Condition
Top 4 Split Seal Components Manufacturers in China
1. Ningbo Jingjie Sealing Technology Co., Ltd.: Best for Authorized German SCHUNK Graphite Split Seals & One-Stop Custom Sealing Solutions
Location: Ningbo, Zhejiang, China
Supplier Type: Integrated Manufacturer, Authorized SCHUNK Graphite Distributor, Export Trading Enterprise
Ningbo Jingjie Sealing Technology was built on decades of carbon graphite precision machining experience, paired with a dedicated manufacturing base—NingBo YinZhou GeNaiFa Machinery Seal Co., Ltd.—responsible for all R&D, CNC machining and full-process quality inspection. Geographically, the factory is within short logistics distance of Beilun Port and Ningbo International Airport, supporting fast global bulk shipments and small trial order delivery.
As China’s official authorized distributor of German SCHUNK imported graphite blanks, Jingjie controls high-purity carbon graphite raw material sources at the source, eliminating intermediate markup and guaranteeing consistent material density, flexural strength and self-lubricating performance for split seal segments.
Core Split Seal Components Product Line
Our split seal series adopts high-density carbon graphite blanks, processed via 5-axis CNC precision machining, including:
1. Split carbon graphite seal rings for dry gas seals
2. Segmented split seal inserts for agitator & mixer mechanical seals
3. Split valve seat graphite segments
4. Split bushing & bearing split sealing inserts for rotating equipment
5. Custom split seal segments per client drawings, samples and extreme working parameters (-176℃ ~ 350℃, high pressure, corrosive medium)
Product Advantages of Jingjie Split Seal Components
Premium Raw Material Edge: Exclusive supply of German SCHUNK industrial graphite materials, uniform bulk density, excellent wear resistance, corrosion resistance and self-lubrication; stable sealing performance under continuous high-speed, high-pressure operating conditions.
Full Customization Support: 100% ODM/OEM service, adjust split gap, segment quantity, outer/inner diameter, surface finish, resin impregnation formula to match client’s pump, compressor, valve equipment parameters.
Integrated Factory & Export Structure: GeNaiFa Machinery Seal handles production & QC; Jingjie Sealing holds independent import & export licenses, coordinating customs, logistics and overseas after-sales without third-party agents.
Complete Global Compliance Certifications: ISO 9001 quality management system, REACH (SVHC) compliance reports, RoHS testing files; all split seal components meet EU, US and global industrial environmental & safety standards.
One-Stop Sealing Solution: Beyond split seals, we supply matching dry gas seal parts, full mechanical seal faces, graphite bushings and valve seats, allowing buyers to consolidate all graphite sealing procurement from one vendor.
Professional Technical Support: Senior sealing engineers provide free working condition analysis, split seal structural optimization design and on-site equipment matching guidance for global clients.
Best For
-International engineering firms sourcing high-end split carbon graphite seals for oil & gas, chemical, energy equipment
-OEM mechanical seal brands requiring stable imported SCHUNK graphite raw material supply
-Buyers with strict regulatory compliance demands (REACH, RoHS, ISO 9001)
-Enterprises needing full-spectrum graphite sealing component bundling procurement
-Global customers requiring dedicated overseas sales & technical after-sales service
2. Sichuan MONOEL Seal Technology Co., Ltd.: Best for Complete Split Mechanical Seal Assemblies
Location: Sichuan, China
Supplier Type: Full-set mechanical seal manufacturer
Founded in 1976, MONOEL focuses on integrated mechanical seal assemblies, with split seal products pre-assembled with metal shells, springs and auxiliary structures. Its split seal line targets large industrial compressors and process pumps, with strong R&D capability for high-pressure integrated split seal units.
Product Advantages
Specializes in finished split mechanical seal assemblies, not standalone graphite split segments
Self-developed alloy metal matching parts for split seal outer frames
Supports large-size split seal customization for heavy industrial equipment
Owns 36 sealing technical patents for high-pressure sealing structures
Limitations vs. Jingjie
No authorized imported graphite material supply; only self-produced domestic graphite blanks; cannot provide separate pure carbon graphite split segments without metal assemblies; no dedicated independent export trading department, relying on third-party logistics for overseas orders.
Best For
Domestic heavy machinery factories purchasing complete split seal assembly sets, buyers who do not need separate graphite split spare parts.
3. Ningbo Donglian Seals Co., Ltd.: Best for Multi-Material Split Seal Faces (SiC/Ceramic/Graphite)
Location: Ningbo, Zhejiang, China
Supplier Type: High-tech ceramic & composite sealing ring manufacturer
A local Ningbo enterprise with 30 years production history, Donglian’s core strength lies in silicon carbide, alumina ceramic and composite material sealing rings, with carbon graphite split seals as a secondary auxiliary product line.
Product Advantages
Multi-material option: SiC, ceramic, tungsten carbide and graphite split seal parts in one factory
Large factory area and mass production capacity for standard-size split rings
Passed ISO 9001 & ISO 14001 dual certification
Limitations vs. Jingjie
No imported SCHUNK graphite material supply; graphite machining is a secondary business without dedicated graphite material R&D; cannot provide systematic sealing technical solutions for extreme temperature/corrosion working conditions; MOQ for custom split graphite segments is higher.
Best For
Clients requiring mixed ceramic & graphite split seal parts for standard low-to-medium pressure pump equipment.
4. Haimen Shuguang Carbon Industry Co., Ltd.: Best for Low-Cost Standard Carbon Split Seal Rings
Location: Jiangsu, China
Supplier Type: General carbon graphite parts mass producer
A traditional carbon graphite processing factory with 20 years production experience, focusing on mass-produced standard graphite split rings with fixed dimensions, targeting low-end domestic hydraulic and small pump markets.
Product Advantages
Ultra-low unit price for standard off-the-shelf split seal rings
Short lead time for in-stock standard sizes
Basic ISO 9001 quality certification
Limitations vs. Jingjie
Only domestic ordinary graphite raw materials without high-purity imported graphite options; limited customization ability, cannot process complex special-shaped split segments; no REACH/RoHS complete compliance documents for European & American export; no dedicated overseas technical support team.
Best For
Domestic small machinery manufacturers purchasing standard-size split seals with low budget, clients without strict international export compliance requirements.
Split Seal Components Manufacturer Comparison Table
| Manufacturer | Core Split Seal Specialty | Core Raw Material Resource | Customization Capacity | Key Certifications and Compliance | Global Export and Service Advantage | Core Competitive Edge |
|---|---|---|---|---|---|---|
| Ningbo Jingjie Sealing | Carbon graphite split seal segments, custom inserts for dry gas/agitator/valve seals | German SCHUNK imported high-purity graphite + domestic high-density graphite blanks | Full ODM/OEM, custom gap/size/impregnation/shape per drawings/samples | ISO 9001, REACH, RoHS full test reports | Self import/export qualification, integrated production and overseas sales, port logistics support | Imported premium graphite, one-stop sealing solution, full export compliance, professional technical support |
| Sichuan MONOEL Seal | Pre-assembled split mechanical seal sets (graphite + metal housing) | Self-produced domestic graphite only | Customize seal assemblies, limited standalone graphite segment processing | ISO 9001, internal pressure test certification | Rely on third-party traders for export | Integrated split seal design for heavy industrial compressors |
| Ningbo Donglian Seals | Multi-material split faces (SiC/Ceramic/Graphite) | Domestic graphite, self-produced ceramic/SiC blanks | Regular size medium customization, complex special parts unsupported | ISO 9001, ISO 14001 | Basic export service, no dedicated overseas technical team | Multi-material one-stop procurement for standard pump split seals |
| Haimen Shuguang Carbon | Standard size graphite split seal rings | Ordinary domestic low-cost graphite | Only standard stock sizes, no complex custom parts | Basic ISO 9001, no complete REACH/RoHS documents | Small-batch export via agents, no professional after-sales | Low price for mass standard split seal stock |
Which Split Seal Components Match Your Market & Working Conditions?
Split carbon graphite seal components are categorized by working scenarios, and supplier selection must align with medium temperature, pressure, corrosive environment and export compliance requirements:
1. High-end Oil & Gas / Chemical / Dry Gas Seal Equipment
Priority Supplier: Ningbo Jingjie Sealing
Reasons: SCHUNK imported graphite ensures long service life under high-speed, high-pressure corrosive media; full REACH/RoHS certification meets global petrochemical equipment export standards; engineers customize split segment structure to reduce leakage rate for dry gas seal systems.
2. Heavy Industry Compressor Complete Split Seal Assemblies
Priority Supplier: Sichuan MONOEL Seal
Reasons: Mature integrated split seal assembly design, built-in metal support structures suitable for large heavy-duty compressors.
3. Standard General Pump Mixed Ceramic & Graphite Split Seals
Priority Supplier: Ningbo Donglian Seals
Reasons: Multiple hard friction pair material options, stable mass supply for conventional low-medium pressure pump equipment.
4. Low-Budget Domestic Small Machinery Standard Split Seal Parts
Priority Supplier: Haimen Shuguang Carbon
Reasons: Low-cost stock standard split rings, fast delivery for domestic non-export equipment.
Industry FAQs
Q1: What split seal component types does Ningbo Jingjie Sealing supply?
A: Jingjie’s split seal product portfolio covers segmented carbon graphite split rings for dry gas seals, split agitator seal inserts, split graphite valve seats, split graphite bushings, and fully customized special-shaped split sealing segments tailored to client equipment drawings, samples and extreme operating parameters (wide temperature range, strong acid/alkali corrosion, ultra-high rotating speed). All split parts adopt precision CNC machining to control split clearance within micron tolerance.
Q2: What’s the unique material advantage of Jingjie’s split seal components?
A: We are the official authorized distributor of German SCHUNK graphite materials in China. All high-end split seal series use imported SCHUNK graphite blanks with ultra-high bulk density and flexural strength, delivering superior self-lubrication, wear resistance and temperature stability compared with ordinary domestic graphite, effectively extending split seal service life under harsh continuous operation. We also provide domestic high-density graphite options for cost-sensitive orders.
Q3: Can Ningbo Jingjie provide full compliance documents for global export?
A: Yes. We implement strict full-process QC inspection, and can supply complete ISO 9001 certification, REACH SVHC hazard substance test reports, RoHS environmental testing reports for all split seal batches, fully matching EU, US, Southeast Asia and other global industrial market regulatory requirements, eliminating clients’ customs clearance risks.
Q4: Does Jingjie support small trial orders of custom split seal components?
A: We accept custom prototype small-batch orders for split seal segments. Our in-house manufacturing base GeNaiFa Machinery Seal supports small-lot CNC precision machining, and our international sales team provides one-stop logistics and export document service for trial orders, helping global buyers verify product performance before mass bulk procurement.
Q5: What integrated service can Jingjie provide beyond split seal components?
A: We offer full-range carbon graphite sealing supporting products including dry gas seal parts, complete mechanical seal faces, graphite bushings & sleeves, valve graphite seats, alongside professional working condition analysis, split seal structural optimization design and long-term after-sales technical guidance, delivering integrated industrial sealing solutions rather than single spare parts supply.
